摘要
利用电化学方法研究了TiO2纳米管掺杂商业Pt/C催化剂(JM公司)对甲醇电氧化性能的影响。通过对不同掺杂量、不同制备方法等研究,利用循环伏安法和恒电位氧化法等手段,表明:掺杂20%TiO2纳米管的电催化剂对甲醇氧化具有较高活性,这可能是由于Pt和Ti之间产生的相互作用,使得甲醇更容易被活化,而二氧化钛本身携带的氧源,更有助于催化氧化甲醇反应的中间产物,减弱了Pt催化剂中毒程度。
The electrocatalysts were prepared by mixing commercial 20% Pt/C （from Johnson Matthery） with TiO2 nanotubes. The electrochemical behaviors were studied in sulfuric acid solution and methanol solution by cyclic voltammtry and chronoamperometry. Different additional quantities and preparation methods were evaluated. The results show that commercial 20% Pt/C electrocatalysts mixed with 20% （mass percentage） TiO2 nanotubes has the higher activity to oxidize the methanol, which may be attributed to the interaction between Pt and Ti. Furthermore, the oxygen source which TiO2 holds may help to the next oxidation of the intermediate from methanol electro-oxidation and may ease the poison degree of the Pt/C catalysts.
出处
《电源技术》
CAS
CSCD
北大核心
2007年第9期713-716,共4页
Chinese Journal of Power Sources
基金
国家自然科学基金资助项目(No.20476055)
973计划(No.2003CB214500)
